Bale end folder



March 1, 1966 c. B. LEWIS 3,237,373

BALE END FOLDER Filed May 18, 1962 5 Sheets-Sheet 1 INVENTOR. Cm/ezes6L5 w/s March 1966 c. B. LEWIS 3,237,373

BALE END FOLDER Filed May 18, 1962 5 Sheets-Sheet 2 IN VENTOR.

.. w (HARLES'BZEW/S i'ri I 48m? ATTORNEY March 1, 1966 c. B. LEWIS3,237,373

BALE END FOLDER Filed May 18, 1962 5 Sheets-Sheet 5 53 I INVENTOR.

CHAELESBLEW/S BY 2 of 2/ P Q E 0- 22 /0/ 22 E March 1, 1966 c. B. LEWISBALE END FOLDER 5 Sheets-Sheet 4 Filed May 18, 1962 INVENTOR. CHflRLEs8.1 E wLs W FITTOR/YEY March 1, 1966 c. B. LEWIS BALE END FOLDER 5Sheets-Sheet 5 Filed May 18, 1962 IN VEN TOR. C HRL58LEWIS HTTOR/YE Y5United States Patent 3,237,373 BALE END FOLDER Charles Burton Lewis,Hoquiam, Wash, assignor to Lamb Gray Harbor (10., Inc., Hoquiam, Wash.Filed May 18, 1962, Ser. No. 195,931 4 Claims. (Cl. 53-378) Thisinvention relates to means for use in the application of protectivewrappers to pulp bales, and the like. More particularly, it relates to anovel and practical machanism for use in conjunction with other machinesof conventional form, in a bale wrapping line, for folding the edgeportions or flaps of bale wrapping sheets inwardly into overlappedrelationship against the bale ends and side surfaces preparatory to thewrapped bale being finally encircled by wrapper securing wires, bands orother ties.

It is the principal object of this invention to provide a novel,simplified and practical mechanism for automatically effecting the abovestated, usual wrapper folding operations; which can be readily movedinto position of use either in the operation of folding the side edges,or the end edges of bale Wrapping sheets against the bale.

It is also an object of this invention to provide a mechanism that canbe moved from place to place for ready assembly in a line with machinesused in a bale weighing, compressing, turning and wrapping operation.

Another object is to provide a folding mechanism as above stated whereinnovel parallel linkage systems mount plates that are operable for endflap tucking and holding; utilizing a top bar that is mounted by arubber spring hinge, for holding wrapper folds in position for movementof the bale to a binding mechanism, and wherein a novel pneumaticcontrol system operates to automatically effect the sequence of foldingoperations either at the side or the end of a bale.

Further objects and advantages of the invention reside in thecombination of parts employed in the apparatus; in their constructionand in the mode of operation of the mechanism as will hereinafter bedescribed.

In accomplishing the above mentioned and other objects of the invention,I have provided the improved details of construction, the preferredforms of which are illustrated in the accompanying drawings, wherein:

FIG. 1 is an elevation of the present wrapper folding mechanism as seenfrom what will herein be designated its outer side.

FIG. 2 is a plan or top view of the present folding mechanism with itsvarious parts in positions corresponding to those shown in FIG. 1.

FIG. 3 is an elevation of the folding mechanism of FIG. 1, as seen fromthe right hand side of FIG. 1.

FIG. 3A is a perspective view of the present mechanism during an endflap folding operation.

FIG. 4 is a schematic showing in plan view of a bale wrapping lineherein designated as the single machine arrangement.

FIG. 4A is a view illustrating the bale Wrapping sequence of stepsfollowed in the use of the single machine arrangement shown in FIG. 4.

FIG. 5 is a schematic showing, in plan view, of a tandem machinearrangement for bale wrapping employing two folding machines of thepresent invention in the wrapping line.

FIG. 5A is a schematic showing of the sequence of steps in wrapping abale by the tandem machine arrangement of FIG. 5.

FIG. 6 is a perspective view of a wrapped bale, after being banded ortied.

FIG. 7 is a schematic layout of the pneumatic control system for thepresent end folding mechanism.

"ice

FIG. 8 is an enlarged fragmental view of one of the end flap foldingwings of one of the parallel link systems.

FIG. 9 is a vertical section taken on line 99 in FIG. 8.

FIG. 10 is a top view of the valve and its actuating lever arm whichcontrols the operation of parallel linkage mechanism.

FIG. 11 is a top view of the valve for control of the bottom paddlemovement.

For a better understanding of the objects, requirements and mode of useof the apparatus of the present invention, it will here be explainedthat pulp bales, as presently made, vary in size but, as a general rule,are approximately 32" square in their horizontal dimension andapproximately 14" to 20 in height. Such bales or stacks are individuallywrapped for storage or shipment by use of two sheets of suitablewrapping paper, each of which sheets is approximately four and one-halffeet square. These sheets are applied to the bale for wrapping in thespecific manner hereinafter described to accommodate the present foldingmechanism.

Preparatory to wrapping the bale, one of the wrapping sheets is placedflatly on a conveyor or table top and the pulp stack is centeredthereon. Then the second sheet is similarly placed on the top of thebale. The bale with the two wrapping sheets thus assembled therewith isadvanced onto a turntable with which the present machine is associated,and while at rest thereon the projecting opopposite side edges of thetop sheet are likewise folded upwardly against the sides of the bale andthe projecting opposite side edges of the top sheet are likewise foldeddownwardly into overlapped relationship with the upturned side edges ofthe bottom sheet. Suitable ties are then drawn about the wrapped bale,usually in spaced relationship therealong in positions to hold thefolded flaps of the wrapping sheets in place. The bale is then turnedhorizontally by the turntable through an arc of and the projectingvertical end flaps of the wrapping sheets are then folded inwardlyagainst the bale ends and the top and bottom edge portions are foldedinto overlapped relationship thereover. Finally, bands of wire or othersuitable ties are drawn about the bale at a right angle to the bandsfirst applied, thus together to hold the wrapper sheets secure.

It is to be understood that the present bale end folder is so designedthat it may be associated with a line of mechanisms as used forweighing, compressing and tying or binding the wrapped bales. It may beemployed for the initial operation of folding corresponding edgeportions of the Wrapper sheets into overlapped relationship against theside of a bale. Then, after a 90 turning of the bale, it may besimilarly employed for first tucking the side flaps of the wrappers intoplace against the bale ends and then folding the bottom and top flapsinto overlapped relationship over.

Use of the present mechanism in what is designated the single machinearrangement has been shown in FIG. 4 and in FIG. 5, it has been shown inwhat is herein designated as the tandem machine arrangement; each ofwhich arrangements will be presently fully described.

Referring more in detail to the drawings:

In the schematic showing of mechanisms in FIG. 4, employing the singlemachine arrangement, 2 designates a horizontal conveyor by which singlestacks or bales B of pulp, or the like, may be delivered, as forexample, from a bale press, not shown, to a wrapping turntable 3.Aligned with the conveyor and turntable is a tying or binding machine Twhereby when a bale is advanced thereinto suitable bands, straps or tiesmay be placed about the bale. Located at one side of the turntable 3 isthe bale end folder F of the present invention and at the opposite sideis the operators station represented by the circle 0.

In the use of this single machine arrangement of mechanisms, a bale B,centered on a lower Wrapper or sheet Wa, as shown in FIG. 4A, isadvanced to and centered on the turntable 3, and the top sheet Wb isthen placed thereon. While the bale still rests on the turntable thebale end folder F is then caused, as presently explained, to fold theadjacent edge of the lower wrapper sheet upwardly and the correspondingedge of the top wrapper downwardly against the side of the bale. Whilethese operations are taking place, the operator performs like wrapperflap folding operations manually at his side of the bale. The bale isthen advanced from turntable 3 into the banding or tying machine T andone or more bands are applied about it as shown. Then the bale B isreturned from the banding machine T to the turntable 3 and rotatedthereby through a 90 turn and the infolding of the wrapper ends bymechanism F is completed at one side of the table, and at the other sideinfolding is likewise completed by the operator. The bale B withwrapping sheets folded at its ends is then advanced into the bandapplying machine T and one or more bands are applied about the bale overthe end folds. Finally, the bale is advanced from the banding machine Tonto an off bearing conveyor C and is conveyed from the wrapping line toa place of storage or use.

In the use of the bale wrapping line that features the tandem machinearrangement shown in FIG. 5, the bale B with folded wrapping sheets We;and Wb placed thereon is advanced to wrapping table 3x where operatorsfold the opposite edge of the wrappers down against the bale sides andcause the bale to be advanced into the banding machine T and one or morebands applied thereabout as at d in FIG. A to hold the side foldssecure. The bale as thus wrapped is then advanced onto a turntable 3cwhereby it is turned an interval of 90 as at e in FIG. 5A. Then the endfolding machines F1 and F2 of this invention, located at opposite sidesof the turntable 3c, are set in motion by the machine operator and theyoperate to simultaneously fold the end flaps of the wrapping sheetsagainst the bale ends as at f in FIG. 5A. The wrapped bale is thenadvanced into the second tying or. banding machine T2 and the desirednumber of bands applied thereabout over its folded ends as at g in FIG.5A. The bale, in its fully wrapped condition and with bands appliedthereabout, is as shown in FIG. 6.

Since the folding machines F1 and F2 are alike in construction and intheir mode of operation, the following description of one as shown inFIGS. 1, 2 and 3 will apply equally to the other.

The folding machine of this invention comprises a rigidly and stronglyformed box-like base structure designated in its entirety by referencenumeral 20. This structure is supported at its four lower corners bycasters 21 for easy rolling movement of the mechanism to differentplaces ofuse. As seen best in FIGS. 1 and 3, the base structure 20 isequipped adjacent its two outside corner edges with vertical stabilizingpins 22 that are adjustable endwise in mounting bearings 22' fixed tothe housing 2t into and from suitable sockets 23 formed in the floorsurface on which the machine is supported in use thus to hold themachine against movement from proper relationshi with the bale supportwhile it is being wrapped.

At its opposite ends, the base structure 20 is equipped withhorizontally extending brackets or shoulders 24-24 with upper surfacesthat are flush with the top surface of the base housing 20. Mountedvertically on each of these shoulders and top surface of the base at itsopposite ends, in laterally spaced relationship are paired tubularbearings 25-25 in which vertical shafts 26-26 are rotatably supported.At their upper ends, the paired shafts 26-26 mount a pair of equallyextending parallel links 27-27 which are pivotally joined across theirouter ends by links 28, thus providing a horizontally swingable,parallel link system at each end of housing 20. Each link system, as

seen in FIG. 2, supports a flat rectangular paddle or plate 29 at itsswinging end. These plates 29 are shown in FIG. 2 to be hingedly securedonly at their outer ends to the corresponding links 28 by vertical hingepins as at 30, thus to allow them to swing from positions engaged.flatly against the links 28, to various angular positions outwardlytherefrom as in FIG. 8 for a purpose which presently will be explained.The swinging actuation of each parallel link system is effected andcontrolled by an air cylinder 32 that is pivotally supported as in FIG.2, from the inside wall of the base housing 20, by a pivot shaft 33.Each cylinder has a piston rod 34 extended therefrom with pivotalconnection, as at 35, with a radial arm 36 fixed to and extended fromthe shaft 26 of that system. Normally, the two parallel link systems areextended as shown in FIG. 1 and are operable inwardly or outwardly inunison by conjoint action of the cylinders 32.

At its inside, as seen in FIG. 3, the base housing 20 horizontallysupports what is designated as the bottom paddle 40, the function ofwhich paddle is to fold the extending edge portion of the bottom wrapperupwardly and against the end face of a bale, both in making a side foldand in making an end fold. This plate 40 is normally horizontallydisposed immediately below the extending wrapper edge, as seen in fulllines in FIG. 3. It is pivotally supported by a horizontal hinge shaft41 mounted by a supporting bracket 42 extended from the inside wall orbale side of housing 20, and it may be swung upwardly to the verticaldash line positioned by connection with 'a piston rod 43 extendingupwardly from an air cylinder 43 that is pivotally supported from theinside wall of the base housing 20, as at 44 in FIG. 3.

Also, supported from the base structure 20 is what is herein designatedthe top bar 45, which is shown in FIG. 1 to extend horizontally andparallel with the line of travel of the bale, substantially to the fullspan of the parallel link systems, as seen in plan view in FIG. 2. Thisbar 45 is slightly outwardly curved at its ends as observed at 45' inFIG. 2 and is operable for the downward folding of the extended edge ofthe top wrapper of the bale against a side face or against an end faceof the bale as positioned for end folding, to hold it and all previouslyformed folds, during the folding cycle, until the wrapper has beenpositioned for tying of the bale.

The top bar 45, as seen in FIG. 3, is hinged to an arm or frame 46 whichis pivotally supported by a horizontal hinge shaft 47 mounted bybrackets 48 that are fixed on the outside edge of the base structure 20.This shaft 47 is equipped with a rocker arm 49 to which the piston rod50' of an air cylinder 50 is operatively connected for the upward ordownward swinging of the top bar 45. The mounting hinge, whereby the bar45 is mounted at the outer end of the arm or frame 46, comprises a flatrubber spring 52 employed in such manner as to allow the top bar 45 toyield backwardly in folding the top wrapper down tightly over the edgeof a poorly formed bale with top edge projecting inside the foldingplane of the bale end folder. The actuating air cylinder 50 for bar 45is pivotally supported at 53 by a bracket 54 that is applied to theouter edge of the base housing as in FIG. 3.

All functional operations of this mechanism F are under control of theair control system which has been schematically shown in FIG. 7 andwhich will subsequent- 1 be described in connection with the descriptionof a wrapper folding operation which follows:

In use of the machine F, assuming it to be used in conjunction withother machines as in the single machine arrangement shown in FIG. 4, itis to be understood that when the bale B reaches its position forwrapper folding on turntable 3, its end folding plates 29-29 are at restin their extended positions as supported by the oppositely extendedparallel link systems therein shown. With the bale B in position forwrapper folding and with the edge portions of the bottom and topwrappers extended beyond the side face of the bale, as indicated at Waand Wb' in FIG. 4, the machine F is then set in motion by an operator tofold the projecting edge of the bottom wrapper upwardly and extendedflap of the top wrapper downwardly.

To accomplish these results, air under pressure is first admitted intothe lower end of air cylinder 43 thus to cause the plate 40 to be swungupwardly on its supporting shaft 41 toward the bale, and in doing this,to cause the extended wrapper edge Wa' to be engaged thereby and foldedupwardly and inwardly against the adjacent side of the bale. Incident tothis initial folding operation, air under pressure also is admitted tothe lower end of cylinder 50 to effect the downward actuation of arm 46with an incident downward swinging of the top bar against the extendededge War of the top wrapper, thus to fold it downwardly and inwardlyagainst the bale side over the upturned edge of the lower wrappers. Theoperator having performed similar folding operations at the other sideof the table, the bale is then caused to be advanced into the bindingmachine T for application of the one or more encircling bands 66 asdesignated in FIG. 6. Then the bale is returned to the table and uponits return it is turned horizontally through a 90 turn thereby placingopposite ends flaps of the bale wrappers in position for their foldingagainst the bale ends; the parts of the machine having been returned tonormal idle position.

The end folding of wrappers is accomplished by first energizing the aircylinders 32 to swing both parallel link systems inwardly, thus to causethe inner vertical edges of the plates 2929 to engage with the extendingvertical side flaps of the bale wrappers to fold them inwardly andflatly against the bale ends, as in dash lines in FIG. 3a. Then, whilethese folds are being held in place by the plates 29-29, cylinder 43 isenergized to actuate paddle 40 upwardly thus to engage and fold thebottom end flap inwardly against the bale end. With the movement ofpaddle 40 to its up position, the parallel link systems are actuatedoutwardly by their air cylinders 32 and by this movement the plates29-29 are laterally with drawn from within the folded side and bottomend flaps, which are held firmly in place by the paddle 40. Air is thenadmitted to the lower end of the cylinder 50 to cause bar 45 to be swungdownwardly against the upper flap to fold it downwardly. In thisoperation the top flap is overlapped on the side and bottom flaps asheld in place by the paddle 40. The paddle 40 and the bar 45 areretained in their actuated positions to hold the completed end folds inplace while the bale is advanced laterally to the tying or bandingstation T as designated in FIG. 6.

To permit the plates 29-49 to be laterally withdrawn from within thefolded side and bottom wrapper flaps without disrupting these flapstheir outer ends have the pivotal mountings 3030. Normally, these plates29 29 are yieldingly drawn and held flatly against the correspondingouter end links 2828 of the parallel link system as shown in FIG. 2, butthey are outwardly yieldably movable therefrom by reason of the springmeans shown in FIG. 8 wherein it is seen that, at each side, a rod isfreely movable through an opening 28' in the corresponding link 28 andis pivotally attached at its outer end to the corresponding plate 29, asat 61. Coil springs 62 are applied about the rods, under compressionagainst the plates 28 and nuts 63 on the rods to yieldingly draw theplates 29 against the links 28. However, with the outward swing of theparallel link systems, the springs yield and allow the plates to angleas they pivot and slide free from the end folds of the wrappers withoutdisrupting or pulling the folds outwardly.

Operating air is supplied to the system as schematically shown in FIG.7, under required pressure, through a filter 90 and shut-off valve 91,to the manual valve 101 which is connected through conventional pipingto the various valves which control the sequence of operations initiatedby the actuation of valve 101. The piping con nections are as indicatedtherein by dash lines.

It is to be understood that the inward and outward actuations of thepiston rods of cylinders 32-32, 43 and 50 control the setting of certainvalves such as shown in FIGS. 10 and 11 of the drawings but which havebeen schematically shown in FIG. 7.

The operation as provided for by the system shown in FIG. 7 for a bundlewrapping operation is completed in four sequential operations. The firstand second sequences are for folding the side flaps against the sides ofthe bale. The third and fourth sequences operate to fold the end flapsagainst the ends of the bale.

Referring now to FIG. 7: This schematic showing of the automatic, allpneumatic control system in FIG. 7 discloses a two position foot pedalactuated valve 101. This is located adjacent the outside of themechanism as shown in FIG. 3A where it is convenient to the operator.

Assuming that the machine F has been positioned properly relative to abale with top and bottom wrappers applied for folding as in FIG. 4A, thefirst cycle of operations is initiated by pressing the foot pedal ofvalve 101. This actuation of valve 101 effects the following operations:

It actuates pilot 11317 on valve 113, which sets the sequencing systemfor the second cycle.

It actuates the pilot 106' on valve 106, which closes an exhaust for thepilot system.

It actuates the pilot 107 on valve 107, which prevents the actuation ofpilot 10417 on valve 104 and actuates the pilot 109' on valve 109, whichopens the pilot system to pressure. Then pressure through the valve 109effects the following:

Actuates the pilot of valve 105 which admits pressure to the lower endof the actuating cylinder 43 for paddle 40 to actuate paddle 40 fromhorizontal position, upwardly to fold the flap of the bottom wrapper upagainst the side face of the bale.

It actuates the pilot 108 on valve 108 which exhausts the pilot 104b ofvalve 104 and actuates pilot 104a on valve 104 which maintains the sideplate actuating cylinders 3232 against actuation and thus retains theplates 29-29 retracted as in FIG. 1 which, in their retracted position,actuate valve through its pilot 110' to allow pressure to be applied tothe lower end of the bar actuating cylinder 50 to bring the bar 45 downand fold the flap of the top wrapper down against the bale. Thiscompletes the first cycle as required for folding the side flaps of thewrappers against the bale.

After the bale has been transferred to the tying or banding station, thesecond cycle is initiated by pressing the foot pedal of valve 101. Thiseffects actuation of the pilot 114a of valve 114 and allows pressure ofthe system to exhaust. This exhausting of the system deactuates thepilot 109' of valve 109 which blocks pressure to the pilot system;deactuates the pilot 107' on valve 107 to open valve 108 to the pilotsystem and it deactuates the pilot 106 on valve 106 which opens a closedpart of the pilot system to exhaust.

The deactuating of the pilot 106' of valve 106 results in deactuation ofthe pilot 108 of valve 108 which opens the pilot 10% of valve 104 to thepilot system; deactuates the pilot 105 on valve 105 to allow pressure tothe top port of the paddle actuating cylinder 43 to return paddle 40 todown position and the top port of cylinder 50 to return bar 45 to its upposition. The parts are now ready for end fol-ding operations.

In connection with the schematic showing of valves 110 and 111 in FIG.7, it will be explained that these are the valves shown in FIGS. 10 and11, and which valves are fixed in the base housing 20 in positions fortheir actuation by lever arms 110a and 111a that are fixed to and extendradially from the shafts 26 that are mounted and actuate the parallellinkage units at opposite sides of the base structure. The arrangementis such that when the linkage swings inwardly and outwardly the settingsof these valves are changed as presently explained.

The third cycle begins with pressing the pedal on valve 101. Thisactuates pilot 113a of valve 113 to set the sequencing system for thefourth cycle, and through valves 114, 106, 107 and 108 actuates pilot10412 of valve 104 which allows pressure to the blank port of the sidepaddle cylinders 3232, bringing the side paddles to inner or foldingpositions to engage and tuck the side flaps into place. When plates29-29 are brought to their inner or folding positions, the valve 111 isactuated to open the rest of the pilot system to pressure.

Pressure through valve 111 then actuates the pilot 108' on valve 108which exhausts .pilot 10411 on valve 104; actuates the pilot 105' onvalve 105 which allows pressure to the bottom of paddle actuatingcylinder 43 to swing paddle 40 up and effect folding of the bottom flapof the bottom wrapper up against the face of the end of the bale overthe side flaps; it actuates pilot 104a of valve 104 to allow pressure tothe rod port of the side paddle cylinders 3232 to retract the sidepaddles 29-29 which in retracted position actuates valve 110 to openposition.

Pressure through valve 110 then actuates the .pilot 103 on valve 103 toadmit pressure to the bottom end of cylinder 50 to actuate the top bar45 downwardly to fold the flap of the top wrapper against the end faceof the bale.

The final cycle begins with pressing the pedal of valve 101. Thisactuates pilot 114b of valve 114 which allows the pilot system toexhaust.

The pilot system exhausting deactuates the pilot on valve 108 whichopens the pilot 104b of valve 104 to the pilot system; it deactuates thepilot 105 on valve 105 which allows pressure to the top of cylinder 43to return the paddle 40 to down position; it deactuates the pilot 103'of valve 103 which allows pressure to enter the top end of cylinder 50to return the bar 45 to up position.

Pressing the pedal of valve 101 again will initiate the first cycle.

I claim:

1. A bale end folder comprising in combination, a base for supporting a,bale with top and bottom wrapping sheets applied thereto and with theextending side fiaps of said sheets folded and flattened against theopposite sides of the bale and with end flaps extending beyond the baleends, and a wrapper folding machine for folding said extended end flapsagainst the bale end; said wrapper folding machine comprising a framestructure positioned adjacent to and beyond the end of the bale againstwhich the end flaps are to be folded, a pair of parallel arms at eachside of the frame pivotally mounted by the frame and normally extendedlaterally therefrom at opposite sides of the frame, wing plates mountedby said pairs of arms at their free ends and at the level of theextended end flaps, including parallel linkage systems whereby said wingplates are retained parallel with the end of the bale in their inwardswinging action and are caused to engage the extended flaps endwise andpress and hold the flaps flatly against the bale end surfaces, powermeans for swinging said pairs of arms in parallelism toward each other,a bottom end flap folding paddle hingedly supported from the frameadjacent the bottom edge of the bale, power means to actuate said paddleupwardly against the extended flap of the bottom wrapper to fold itupwardly against the bale end, a top end flap arm hingedly supportedfrom said frame above the bale, a horizontal bar mounted by said top endflap arm, means for swinging said bar downwardly to engage the extendedflap of the top wrapper to fold it downwardly against the bale end andmeans for actuating the parallel arms outwardly to extract said wingplates from the inwardly folded sides of the end flaps.

2. A combination according to claim 1 wherein said arms of the parallellinkage systems are mounted at their inner ends on vertical pivot shaftssecured to the frame structure and are pivotally interconnected at theirouter ends by connecting links, and wherein said wing plates are hingedat their outer ends to the corresponding arm connecting links and areyieldingly held thereagainst at their inner ends by spring means and arepermitted outward movement as withdrawn from between the folded endflaps of the bale.

3. A combination according to claim 1 wherein the power means forswinging said arms includes cylinders mounted in the frame structure forthe actuation of the parallel linkage systems to swing them in unisoninwardly for the inward folding of the opposite sides of the end flaps,and wherein the inward swinging of said arms initiates an upwardactuation of the hinged paddle to fold the bottom end flap upwardly,followed by the outward swinging of the parallel linkage system toreturn the side plates to their outward position and to effect thedownward actuation of said horizontal end bar to fold the top end flapdownwardly against the bale end.

4. A combination as in claim 1 wherein a second wrapper folding machineis positioned at the opposite end of the bale and said wrapper foldingmachines fold the ends of the bale simultaneously.

References Cited by the Examiner UNITED STATES PATENTS 1,008,197 11/1911Richter et al. 53-218 1,979,496 11/1934 Schilbach 53371 2,858,65711/1958 Guthrie 53-2l8 2,911,778 11/1959 Ozor 53371 2,937,484 5/1960Wirnan 53-135 3,078,633 2/1963 Stromberg et al. 53 378 TRAVIS S.MCI-IEHEE, Primary Examiner.

FRANK E. BAILEY, Examiner.

